All of the following are true about lipids except:
Correct answer: B. They are polymer of fatty acids
- A. They store a high amount of energy
- B. They are polymer of fatty acids
- C. They play important role in insulation
- D. They are mostly hydrophobic
Explanation
Option B is correct. Lipids are not polymers of fatty acids. A polymer is a molecule made up of repeating units of a smaller molecule, called a monomer. Fatty acids are not monomers, they are the building blocks of lipids. Lipids are a diverse group of molecules that include triglycerides, phospholipids, waxes, and steroids. Triglycerides are the most common type of lipid, and they are made up of three fatty acids attached to a glycerol molecule. Phospholipids are also made up of a glycerol molecule, but they also have a phosphate group and a fatty acid. Waxes are made up of fatty acids and long-chain alcohols. Steroids are a type of lipid that has a ring structure.
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The chapter covers water's polarity and biological roles, carbohydrates, lipids, proteins and nucleic acids, including their monomers, bonds, structures and functions. It also distinguishes RNA from DNA and explains conjugated molecules such as glycoproteins, glycolipids and nucleoproteins, which combine organic molecules with a non-protein component.
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